Acer X1213 - Manual (Page 31)

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h Aspect
Ratio
Use this function to choose your desired aspect ratio.
• Auto: Keeps the image with original width-height ratio
and maximizes the image to fit native horizontal or
vertical pixels.
• 4:3: The image will be scaled to fit the screen and
displayed using a 4:3 ratio.
• 16:9: The image will be scaled to fit the screen and
displayed using a 16:9 ratio.
Keystone
(for X1110/
X1110A/X1210/
X1210A/X1213/
X1216) Adjusts image distortion caused by tilting projection (±40
degrees).
Auto Keystone
(for X1210K/
X1210S) Automatically adjusts image distortion caused by tilting
projection (±40 degrees).
Manual
Keystone
(for X1210K/
X1210S)
Manually adjusts image distortion caused by tilting projection
(±40 degrees).
<Note> The Manual Keystone funcion is unavailable under
Auto Keystone setting to "On".
Sharpness
Adjusts the sharpness of the image.
• Press to decrease the sharpness.
• Press to increase the sharpness.
H. Position
(Horizontal
Position)
• Press to move the image left.
• Press to move the image right.
V. Position
(Vertical
Position)
• Press to move the image down.
• Press to move the image up.
Frequency
Changes the projector’s refresh rate to match the frequency
of your computer’s graphics card. If you experience a vertical
flickering bar in the projected image, use this function to
correct it.
Tracking
Synchronizes the signal timing of the display with the graphics
card. If you experience an unstable or flickering image, use
this function to correct it.